Three skinned interfaces. Visualization Studio lets you create your own visualizations, DSP Studio allows personalization of the listening environment. Smartlists based on rules. Drag-and-drop for easy Playlist creation. Unique media browsing views for faster, easier and more powerful file search and play. Tagging studio. Integrated CD labeler. Support for CD and DVD database and support for popular handheld players.

AUDIO
Convolution -- Fine adjustment for room size and composition
Volume leveling and other DSP effects can be applied in a sync to a handheld
Gapless iTunes encoded MP3 playback
Resample by Samplerate -- set MC17 to output any sample rate for each samplerate you have -- 88.2 for 44.1
DSD bitstreaming over ASIO
Audio Path Direct -- An information window that shows what DSP effects are being applied (if any). Hover over the small DSP icon in the upper right corner while audio is playing.
Television program guide view backdrops in Theater View
DVD playback over Library Server

IMAGES
Image orientation

VIDEO
Conversion in DLNA and Library Server
Red October Improvements for DirectShow video
Subtitle Improvements
Blu-ray title selection
Carnac -- auto-tagging engine that fills in missing information about files by using the filename, codec, and other known information